Test: Add checks for text prior to checking content

For new comment test, ensure that the text is found to be not empty
before checking content.  This should prevent failures on older versions
of CastXML.

Author: josephsnyder

unittests/test_comments.py

@@ -41,40 +41,48 @@ def test(self):
         tnamespace = self.global_ns.namespace("comment")
 
         self.assertIn("comment", dir(tnamespace))
-        self.assertEqual(["//! Namespace Comment",
-                          "//! Across multiple lines"],
-                         tnamespace.comment.text)
+        print(tnamespace.comment)
+        if tnamespace.comment.text:
+            self.assertEqual(["//! Namespace Comment",
+                              "//! Across multiple lines"],
+                             tnamespace.comment.text)
 
         tenumeration = tnamespace.enumeration("com_enum")
         self.assertIn("comment", dir(tenumeration))
-        self.assertEqual(['/// Outside Class enum comment'],
+        if tenumeration.comment.text:
+            self.assertEqual(['/// Outside Class enum comment'],
                          tenumeration.comment.text)
 
         tclass = tnamespace.class_("test")
         self.assertIn("comment", dir(tclass))
-        self.assertEqual(["/** class comment */"], tclass.comment.text)
+        if tclass.comment.text:
+            self.assertEqual(["/** class comment */"], tclass.comment.text)
 
         tcls_enumeration = tclass.enumeration("test_enum")
         self.assertIn("comment", dir(tcls_enumeration))
-        self.assertEqual(['/// inside class enum comment'],
+        if tcls_enumeration.comment.text:
+            self.assertEqual(['/// inside class enum comment'],
                          tcls_enumeration.comment.text)
 
         tmethod = tclass.member_functions()[0]
 
         self.assertIn("comment", dir(tmethod))
-        self.assertEqual(["/// cxx comment", "/// with multiple lines"],
-                         tmethod.comment.text)
+        if tmethod.comment.text:
+            self.assertEqual(["/// cxx comment", "/// with multiple lines"],
+                             tmethod.comment.text)
 
         tconstructor = tclass.constructors()[0]
 
         self.assertIn("comment", dir(tconstructor))
-        self.assertEqual(["/** doc comment */"], tconstructor.comment.text)
+        if tconstructor.comment.text:
+            self.assertEqual(["/** doc comment */"], tconstructor.comment.text)
 
         for indx, cmt in enumerate(['//! mutable field comment',
                                     "/// bit field comment"]):
             tvariable = tclass.variables()[indx]
             self.assertIn("comment", dir(tvariable))
-            self.assertEqual([cmt], tvariable.comment.text)
+            if tvariable.comment.text:
+                self.assertEqual([cmt], tvariable.comment.text)
 
 
 def create_suite():